目的:肩關節周圍穩定肌群的神經肌肉控制能力對於肩上運動表現甚為重要,健康的投手有可能因為肩部穩定肌群疲勞產生而引發肩部不穩定症。棘上肌在長時間投擲運動後疲勞,常導致肩關節無法在投擲過程正常外展與壓制肱骨頭,可能造成肩部不穩定與本體感覺功能負面影響。方法:本研究募集實驗組60名男性受試者(平均年齡21.9 ± 2.0歲)與控制組20名男性受試者(平均年齡22.75 ± 2.23歲),利用Zebris壓力分布儀與單手肘與單手掌支撐測試,觀察壓力中心晃動路徑速度、長度與晃動面積,以量測肩部神經肌肉控制表現。並使用關節活動度量角器進行肩關節外展60°與外展120°的本體感覺測量。再利用Biodex等速肌力儀進行棘上肌疲勞程序,以觀察肩部神經肌肉控制穩定能力與本體感覺功能是否受到影響。最後透過肌內效貼布針對棘上肌的貼紮,比較貼紮前後肩部神經肌肉控制與本體感覺功能差異。結果:研究成果發現疲勞前後外展60°動作本體感覺疲勞前(平均值0.60 ± 0.94度)、後(平均值2.25 ± 1.41度)呈現顯著差異(p = 0.002),疲勞前後外展120°動作本體感覺疲勞前(平均值0.80 ± 0.97度)、後(平均值1.65 ± 1.81度),呈現顯著差異(p <. 05)。其他晃動面積、晃動速度、晃動長度在貼紮肌內效後與休息後皆無顯著差異(p >. 05)。結論:本研究發現棘上肌疲勞後肌內效貼紮對神經肌肉控制無顯著影響,但對本體感覺肩部外展有顯著改善效果。
Purpose: Neuromuscular control around shoulder joint is very important to overhead sports, fatigue in stability muscles could lead to shoulder instability in healthy pitchers. Shoulder instability and poor proprioception often result from muscle fatigue of the supraspinatus due to long throwing activity, which may result in inability to perform shoulder abduction and the depression of the humeral head. Methods: In this study, we recruited 60 male participants in the experiment group (mean age: 21.9 ± 2.0 years old) and 20 male participants in the control group (mean age: 22.75 ± 2.23 years old). Shoulder neuromuscular control ability was measured under single hand support or single elbow support position using Zebris Pressure Distribution force plate for detecting sway path velocity, area and length. Proprioception was measured using goniometer in which shoulder abduction 60 degree and 120 degree were evaluated. Then the fatigue procedure was introduced in order to compare the difference between before and after the application of kinesiotape to the supraspinatus via shoulder neuromuscular control ability test and proprioception test. Results: We found significant difference between pre-fatigue (60 degree: 0.60 ± 0.94 & 120 degree: 0.80 ± 0.97) and post-fatigue (60 degree: 2.25 ± 1.41 & 120 degree: 1.65 ± 1.81) in proprioception (p = .002 and p = .046) but no significant difference found in sway path velocity, area and length (p > .05). Conclusion: We found that kinesiotaping brought significant improvement on proprioception after fatigue of the supraspinatus but not on neuromuscular control.